Looks like this moved IA to Biden on the 538 Model:
Biden--- 46.5%
Trump-- 46.1%
Might be some $$$ to be made here in the online betting markets (Which I don't play--- but probably should...
)
Agree with the general comments from multiple posters regarding movement is probably happening both in "rural areas", "ancestral working class DEM cities", as well as as likely larger than average swings in what consists of "suburbs" for IA...
As I have mentioned in the past on multiple other threads, IA does have a significant college student population, (including quality private and religious schools not just State colleges & universities) as well as a decent quality state education system.
Although a Biden win in IA is not inconceivable at this point, it is worthy of note that Obama perhaps might have been unusually strong here, simply because he was a Midwestern Democrat from a neighboring State (not to mention his Grandma from Kansas), so we can't necessarily expect to see Biden perform as well as Obama did in '08 / '12....